28450422 has 96 divisors (see below), whose sum is σ = 82817280. Its totient is φ = 6816960.

The previous prime is 28450403. The next prime is 28450423. The reversal of 28450422 is 22405482.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28450423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17229 + ... + 18807.

It is an arithmetic number, because the mean of its divisors is an integer number (862680).

Almost surely, 2^28450422 is an apocalyptic number.

28450422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28450422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41408640).

28450422 is an abundant number, since it is smaller than the sum of its proper divisors (54366858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28450422 is a wasteful number, since it uses less digits than its factorization.

28450422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618 (or 1615 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 28450422 is about 5333.8936997282. The cubic root of 28450422 is about 305.2785129529.

The spelling of 28450422 in words is "twenty-eight million, four hundred fifty thousand, four hundred twenty-two".